206B3 fuel capacity
To be fair, it does actually work that way.
From times past I recall that one can in fact glance back and obtain an indication although, I'll be the first to admit, the arrangement is a little "Heath Robinsonish!"
and should have been thought through properly in the first place
The "L" model had a shorter version.
Who remembers the removable extender that just clipped on where the standard cap went as required rather than the AA unit which bolted on?
Worked great on the 205/212 as well but that is another story!